* {
    margin: 0;
    padding: 0;
}
/*整体样式*/
body {
    background: url("../img/bc.jpg") no-repeat center center fixed;
    -webkit-background-size: cover;
    -o-background-size: cover;
    background-size: cover;
}
.box{
    border: #FAFAD2 2px solid;
    width: 420px;
    height: 450px;
    margin-left: 34%;
    margin-top: 6%;
    text-align: center;
}
.box >button{
text-align: center;
    vertical-align: center;
    width: 190px;
    background-color: #E0FFFF;
    font-size: 26px;
    font-family: 黑体;
}